@Adoril 

Refer to this step 2: https://www.tp-link.com/us/support/faq/3091/

Think you did not get things right. They have a guide for this kind of setup. 

@Adoril 

Hi, i saw you have set up dhcp servers in both sections - the switch AND the gateway.

You should use only the gateway.

Here is a comprehensive Tutorial from TP-Link with the actual OMADA-Hardware. All steps ar illustrated, setting up the WAN, LAN, VLAN and ACLs.

https://community.tp-link.com/en/business/stories/detail/1824

Greatings

@nutzich 

Thanks for the reply. Fortunately i accidently stumbled on the answer yesterday when i tried to log into the gateway and it gave me back the router rather than the switch! Once i changed it to a VLAN interface rather than a full interface i just set up my normal static route from the router to the switch and touch wood all has worked fine.

The guide does look good though. I do think Tp Link could do with a modified FAQ showing how to set up the switch as a gateway, they have one for setting it up as a DHCP server (https://www.tp-link.com/uk/support/faq/3155/) which gets you half way there but there is still some elements missing.